File: dyn-trait-elided-two-inputs-ref-param.rs

package info (click to toggle)
rustc 1.85.0%2Bdfsg3-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental, sid, trixie
  • size: 893,396 kB
  • sloc: xml: 158,127; python: 35,830; javascript: 19,497; cpp: 19,002; sh: 17,245; ansic: 13,127; asm: 4,376; makefile: 1,051; perl: 29; lisp: 29; ruby: 19; sql: 11
file content (23 lines) | stat: -rw-r--r-- 492 bytes parent folder | download | duplicates (6) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
 
// Test that `impl Alpha<dyn Object>` resets the object-lifetime
// default to `'static`.
//
//@ check-pass

trait Alpha<Item: ?Sized> {
    fn item(&self) -> Box<Item> {
        panic!()
    }
}

trait Object {}
impl<T> Alpha<dyn Object> for T {}
fn alpha(x: &str, y: &str) -> impl Alpha<dyn Object> { () }
fn is_static<T>(_: T) where T: 'static { }

fn bar(x: &str) -> &impl Alpha<dyn Object> { &() }

fn main() {
    let s = format!("foo");
    let r = bar(&s);
    is_static(r.item());
}